2. The global warming is the increase in the average temperature of the earth. It is caused by the increasing concentrations of the greenhouse gases, which are the result of the burning of fossils fuels and deforestation.
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5. The global warming increases the temperature of the earth between 0.4º C and 0.8ºC. It especially affects the poles. The melting of the poles causes the increase of the sea levels and it changes the climate of the world. It also kills the animals that live there.
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8. It is the warming of the atmosphere caused for different gases, such as carbon dioxide, ozone, water vapor. These gases don’t allow the solar rays to come out.
